Circular-knitting machine



Nov. 18, 1930.

J. H. G. BAYLES CIRCULAR KNITTING MACHINE Filed Nov. 26, 1929 PatentedNov. 18, 1930 cIRcULAn-im rrme MACHINE Application filed November 26,1929, Serial No. eoassaana' in Great Britain December 12, 1928. c

Thisinvention relates to improvements in circular knittingmachines, andrefers to improvements in the means that are provided for adjusting the'presser and sinker-cams of such machines. The invention is moreparticularly applicable to 'multi-feeder machines fitted withindependently operated bearded needles, which latter necessitate theprovision at each feeder of an adjustable vl0 Presser-campreferably-arranged so that it can be put out of action by the automaticmechanism which is provided for stopping the machine when 'athread'fails or breaks.

- In circular knitting machines of this type,

v three adjustable cams are provided in or on the sinker cam-ring ateach yarn feeder, that is, one presser and two sinker-cam elements.These cams are in' existing machinesadjusted by means of screwslocatedinthe body of the sinker cam-ring, and the latter has to be pro-- videdwith horizontally disposed radial holes to admit the screws. Thecam-ring is consequently weakened to a serious extent where theadjusting screws are situated, and has in con'sequence to be madestronger and heavier than would otherwise be necessary.

According to this invention, the'cam' adjusting screws for each feederare located in a housing which is secured onthe top of the sinkercam-ring, andthe said screws which have inner and outer screw threadedparts of diiferent pitches, are connected by means of screw-threadedsleeves to and actuate approximatelyra'dial slides on the undersideofthe said ring, to which the beforementioned cams are attached. Thecam-ring is not with this arrangement weakened inorder to accommodatethe screws, and in cases where for example three or more adjustmentscrews are required in connection with each feeder, all the screws ateach feeder can be conveniently located in one and the same housing.

Referring to the accompanying drawings.

Fig. 1 is a sectional side elevation, and

Fig. 2 a plan partly in section, ofthe cam.

adjusting means in connection with one feeder of a circular knitting.machine, constructed accordlng to our invention.

Fig. 3 is an inverted plan showing ad- ,jnstable cams.

Like letters indicate likepartsthroughout the drawings. Y i

In carrying'out cam adjusting screws A, B and C usually provided at eachfeeder, are disposed "in a housing 1) which issec'ured on the upper facei of thesinker cam-ring E, preferably by meansof 'two vertical screws F,(see Fig. 2) and three approximately radial slides G, .H and J,aredisposed in recesses in the underside of the said'cam ringdirectlyunder the this invention, the three 5 housing-D. The presser-cani K issecured to the middleslideI-I, and the sinker-cams L to .65 the twoouter ones G and J.

Theslides G, H and J are connected to the screws A,-B and (1, and inorder toprovide avery fine adjustment, a positive movement in bothdirections, and a release for the press- 0 er cam K the followinconstruction is ado tedQThe two outer screws A and C are provided attheir outer ends with screw-threads which engage in screw-threaded holesin the housingD, and with a finer screwthread- 5' ed partat their innerends, which engage withfscrew-threaded sleevesA and C which are also.mainly disposed in the housing 1).

The projecting ends of these sleeves A -and C are connectedto the camslides G and J, bymeans of vertical studs G 5 which pass up throughslots M in the cam-ring E, and are secured in holesprovlded for them inheads on the, projecting ends of the sleeves A and C? as shown. Theconnection described prevents the sleevesA and C from rotating withtheir respective screws A'and and t 'WlllbQ appreciated that the extentof the movement imparted to the cam-slides each revolution of thescrews, isiin, the arrange- 99 ment .set forth. determined the,dliference in the pitches of the twoscrew-threaded-portions thereon.

The presser ca m adjusting screw B, is connected to the p'ressercam-slide H by a similar arrangement to that described, the inner end ofthe sleeve B associated with therscrew B, being connected to the slide Hby a stud H on the latter rising through a slot M in the camring E andengaging in ahole in the pro- 100 V I jecting end of the said sleeve,but in this case and in order that the presser cam K can beautomatically put out of action, the outer screw-threaded portion of theadjustment screw B works in a screw-nut O which slides in a spaceprovided for it in the housing D, and the said nut isheld in its innerend or normal position as shown in Figs. 1 and 2 by means of a pivotedcatch-lev'erP, against the the "action of springs Q and T (see Fig; 1)

bothof which tends'to move the screw B and the cam slide H' outward. Thecatch lever P is pivoted at P to the housing D, and its upper end isconnected to theordinary machine stop mechanism, and when this comes 7intoaction owing to the failure of the thread,

the lever P is tripped, the sliding nut O is released, and thepresser-cam K is moved back by the springs Q and T thereby obviating thepressing off of the work when the thread. fails or breaks.

If preferred springs T may be disposed on the sleeve A and C betweentheir enlarged projecting ends and the inner ends of the opening in thehousing in which they are disposed, and in this case they only serve totake up any lost motion.

' has the divisionsnotched, and a spring plungturned until the readingsagree again.

er V is provided to engage in these notches and prevent thediscs R fromrotating with the screw. The other outer discs S is connected to androtates with the screw, and for this purpose it is formed with a sleeveS the latter has a longitudinal slot S and a projecting pins on thescrew engages in this slot. This arrangement permits of the screw movinglongitudinally without the disc and at the same time maintains theconnection. Both d scs are held together close up to the housing andthus prevented from moving longitudinally on the screw by means or"studs W fixed in 'the'housing as shown in Figs. 2 V

and 3.

With-the arrangement describedpthe non-- rotatingnotched discs R can beset to the same reading as the discs which rotate with thescrews, and inmaking a readjustment of thesi nker cams, the notched discs R are. allturned t he same number of divisions, and each of the screws A and C issubsequently 7 With this arrangement the sinker cam-s at the re spectivefeeders can all be readjusted from time to time to the same degreewithout trial and with the minimum risk of error.

The inner discs R which is the larger of r What I claim as my inventionand desire to secure by LettersPatent is 1. In a circular knittingmachine, means for adjusting the presser and sinker cams comprising incombination a sinker cam ring, a housing secured on the upper face ofthe said cam-ring,a series of adjustment screws disposed in the housingsaid screws having screw-threaded parts engaging in the hous ing orparts disposed therein, and screwthreaded parts of a different pitchengaging in sleeves which are'connected to the respective cam-slides onthe underside of the camring, substantially as described.

2. In a circular knitting machine, means for adjusting the presser andsinker cams according to claim 1, in which the screw actuated sleevesare connected to the cam-slides by means of vertical studs on the latterwhich pass up through slots in the cam-ring and have their upper endssecured in holes provided for them in the projecting ends of the saidscrew actuated sleeves, substantially as described.

3. In a circular knitting machine, means for adjusting the presser andsinker cams according to claim 1, in which the outer portion of thepresser cam adjusting screw works in a screw nut which slides in thehousing and said nut is held against the action of a cam withdrawalspring'or springs by means of a catch-lever which can be connected toand tripped by the machine stop mechanism whereby the screw-nut isreleased and the presser cam withdrawn by the action of the spring orsprings, substantially as described.

4. In circular knitting machine presser and sinker cam adjusting meansaccording to claim 1, providing each screw with two indicating discsengraved with the same number of divisions one of which is adapted torotate with the screw Whilst the other is notched and is normally heldby a spring catch but is angularly adjustable by hand i11- dependentlyof the screw for the purpose of facilitating the adjustment of the camsat different feeders all to the same extent, substantially as described.

In testimony thereof I have affixed my signature. 7

JOHN HENRY'GLENN BAYLES.

